Closing device for window-sashes.



W. L. BROWN.

CLOSING DEVICE FOR WINDOW SASHES.

APPLICATION FILED APR. 20,1912.

1,G52,88%; Patented Feb. 11, 1913.

2 SHEETS-SHEET 1.

In V611 tor:

W. L. BROWN.

cLosme DEVICE FOR WINDOW SASHES.

APPLICATION FILED APR. 20,1912.

Patented Feb. 11, 1913.

2' SHEETS-SHEET 2-1 illlL- l. m 1| ainli iiuii rain earns A WILLIAM L. BROWN, OF NEW ROCHELLE, NEW YORK, ASSIGNOR TO S. H. POMEROY, OF NEW ROCHELLE, NEW YORK.

CLOSING DEVICE FOR WINDOW-SASHES.

Specification of Letters Patent.

Application filed April 20, 1912.

Patented Feb. 11, 1913.

Serial No. 692,204.

To all whom it may concern:

Be it known that I, VVILLIAM L. BROWN, a citizen of the United States, residing in New Rochelle, county of WVestchester, State of New York, have invented certain new and useful Improvements in Closing Devices for l/Vindow-Sashes, of which the fol lowing is a specification, reference being had to the accompanying drawings, which form a part hereof.

This invention relates to devices adapted to operate in connection with single counterweights to close or permit the closing of the sashes of fireproof Windows in case of an abnormal rise in temperature in the vicinity thereof.

According to the invention the counterweight, which is normally operative with respect to both the upper sash and the lower sash, is, at a predetermined temper ature, automatically disconnected from the lower sash, permitting the same to close by gravity, and practically simultaneously connected to the upper sash to close the same positively. Devices for this purpose have been heretofore contemplated, but their form has been so complicated and expensive as to preclude their general use.

It is the object of this invention to provide a single device set in operation by an abnormal rise in temperature, which shall be of simple and inexpensive construction, invariable in its operation and readily applicable to sashes of fireproof windows, in which a single counterweight for both sashes is employed.

The invention will be more fully explained hereinafter with reference to the accompanying drawings in which-.

Figure l is a fragmentary sectional view in side elevation of a fireproof window frame with its accompanying sashes provided with the present invention. Fig. 2 is a sectional view taken on the plane indicated by the line 2-2 of Fig. l and looking in the direction of the arrows. Fig. 3 is a detail view showing the relation of the counterweight and sash cord to the clutch. Fig. 4 is a view in perspective of the clutch.

Referring particularly to Fig. 1, it will be seen that the metallic window frame a has an upper sash b and a lower sash 0, both vertically movable therein and provided with a sash cord or chain d which has its ends attached to the sashes b and c and supports in its bight a pulley e, carrying a counterweight f. This chain (Z runs freely over suitable pulleys g and h mounted in the usual position in the upper end of the casing of the frame a. The upper sash b has one end of the chain cl permanently fastenecl to it while a suitable fusible link device (Z is introduced in said chain at some point between the lower sash c and the pulley e. If desired this link device may comprise the fastening means of the cord (Z and the sash 0, although the invention is not limited to any specific means for rending the chain d at a predetermined temperature.

Pivotally attached to the upper portion of the block of the pulley e is the cord or chain clutch. This comprises in the form shown a member m, which extends between the vertical portions of the chain cl and has key hole apertures m and m adjacent its extremities, through which the respective portions of said chain reeve during vertical movement of the pulley e. The member m has one arm of bent upwardly and over upon itself as shown clearly in Fig. 4, to form a frame m in the upper part of which is disposed a guide sleeve 111/ through which runs the vertical portion of the chain d which is attached to the lower sash c. The reversely bent portion m is disposed entirely on one side of the pivotal connection m of the member m and the pulley c. This additional weight causes the clutch to tend to assume an angular position with respect to the chain (Z when it is relieved of the tension of the chain. However, the latter, by its pressure on the guide m maintains the member m in a substantially horizontal position to permit free rendering of the chain through the apertures m and m Each aperture, it will be noted, comprises a relatively large portion through which the chain (Z freely runs when the clutch m is in a substantially horizontal position, as shown in Fig. 3, and a relatively narrow portion or slot contiguous to the large section to engage the chain cl firmly and hold the same against relative movement with the pulley 6 when said device assumes an angular position with respect to the chain (Z as indicated by dotted lines in Fig.

From the above description it will be obvious that during normal operation of the sash, the clutch remains inactive, being raised and lowered with the pulley e and 110 being held in a substantially horizontal position by the tension of the chain (Z in the guide sleeve m thus permitting the two portions of the chain to run freely through the relatively large sections of the apertures m and 1773. However, when the fusible link device cl parts and releases the chain (Z the pressure of the latter on the guide m ceases and the member m is no longer supported in its substantially horizontal position. The clutch then immediately assumes an angular position with respect to the chain cl, as indicated by dotted lines in Fig. 8, thus permitting the links of the chain (Z to enter the restricted portions or slots of the apertures m and m These restricted portions or slots will not permit the chain torun through but an engagement is effected which connects the counterweight f firmly to the upper sash b. This is in effect a redoubling of the pull on the sash so that the latter is immediately raised to closed position. It will be understood that immediately upon severance of the chain (Z the lower sash 0 will drop to closed posit-ion by its own weight.

WVhat I claim is:

1. The combination of two sashes, a counterweight, a flexible connection to connect said weight operatively to both sashes, a

fusible link device for releasing the weight from one of the sashes and means carried with the weight and adapted to engage any portion of said flexible connection immediately upon the operation of the fusible link device to connect the weight to the other of said sashes to move the same.

2. The combination of two sashes, a counterweight, a flexible connection between said weight and both sashes, heat-responsive means for releasing one of the sashes from the weight and means connected to and movable with the counterweight and adapted to engage any portion of said flexible connection upon the operation of the heat-responsive means to transfer the entire weight to the other sash.

3. The combination of two sashes, a counterweight, a pulley to which the counterweight is attached, a flexible connection between said pulley and both sashes, heat-responsive means for releasing one of the sashes from the weight and means carried by the pulley and adapted to engage any portion of said flexible connection upon the operation of the heat-responsive means to transfer the entire weight to the other sash.

4. The combination of two sashes, a counterweight, a pulley to which the counterweight is attached, a flexible connection between said pulley and both sashes, heat-responsive means for releasing one of the sashes from the weight and means carried by the pulley and adapted to engage any portion of said flexible connection upon the operation of the heat-responsive means to transfer the entire weight to the other sash, said means comprising a member having apertures through which said flexible connection reeves, and with which the connection engages upon the operation of the heatresponsive means.

5. The combination of two sashes, a counterweight, a pulley to which the weight is attached, a flexible connection between said pulley and both sashes, heat-responsive means for releasing one of the sashes from the weight, and a clutch pivotally mounted on the block of the pulley to connect the weight to the other of said sashes to move the same, said clutch comprising a member having apertures through which the vertical portions of the flexible connection reeve, and a guide co-acting with the flexible connection to hold said member normally in an inoperative position, said apertures having relatively restricted slots contiguous thereto to engage the flexible connection upon the operation of the heat-responsive means.

6. The combination of two sashes, a counterweight, a pulley to which the weight is attached, a flexible connection between said pulley and both sashes, heat-responsive means for releasing one of the sashes from the weight, and means pivotally mounted on the block of the pulley to connect the weight to the other of said sashes to move the same, said means comprising a member having apertures through which the vertical port-ions of the flexible connection reeve and having a reversely bent portion, and a guide carried thereby to receive said flexible connection and hold said member normally in a substantially horizontal position, said apertures having slots contiguous thereto to engage the flexible connection upon the operation of said heat-responsive means.

7. The combination of upper and" lower sashes, a counterweight, a pulley to which the counterweight is connected, a flexible connection having its ends connected to the sashes respectively and having the pulley normally resting in a bight thereof, heatresponsive means for releasing the connection from the lower sash, and a clutch carried by the pulley and normally held by the tension of the flexible connection in inoperative position and adapted when the flexible connection is released from the lower sash, to clutch the flexible connection and connect the counterweight positively thereto.

This specification signed and witnessed this 18th day of April A. D., 1912.

WILLIAM L. BROWN. Signed in the presence of S. H. KoMERAY,

RoBT. S. BEATTY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

